Material for deadening sounds.



No. 841,897. PATENTED JAN. 22, 1907.

A; v. RINGSTRGM. MATERIAL FOR DBADBNINGSOUNDS.

APPLICATION FILED APB. 21-, 1905.

Wjnessaa. I flu/671 3077 Mm 7 I 555% Y w AUGUST VILHELM RINGSTROM, OF STOOKHOLM, SWEDEN.

MATERIAL FOR DEADENING SOUNDS.

Specification of Letters Patent.

Patented. Jan. 22, 1907.

Application filed April 21,1905- Serial N0 256,820-

To all whom it may concern:

Be it known that I, AUGUST VILHELM RINGsTRoM, a subject of the King of Sweden and Norway, residing at Kyrkogatan, Stockholm, Sweden, have invented certain new and useful Improvements in Material for Deadening Sounds and the Manufacture of the Same, of which the following is a specification.

The present invention relates to material for deadening sounds due to friction, blows, and the like against the same and for the methods of making said material, and is es ecially applicable for covering wheels, bra eshoes, and the like.

Referring to the drawings, in which like parts are similarly designated, Figure 1 is a view illustrating three strips of hard material, such as steel, bent zigzag, the folds be ing made at an angle to the longitudinal direction of the strips. Fig. 2 is a like view with softer material inserted between the folds. Fig. 3 illustrates the softer material folded transversely between the folds of harder material. Fig. 4 is a cross-section, and Fig. 5 is a plan, showing how said material may be secured to a wheel-rim or the like. Fig. 6 is a side elevation, and Fig. 7 is an end view, of a pair of rollers for folding the strips.

The strips of material, which are thin, may be of steel or other hard and flexible substance and are laid one upon the other and folded into zigzag form and afterward pressed together, so as to form a solid compact wear mass, the number of strips or bands that can be laid one upon the other depending upon the uses for which they are intended.

In Fig. 1 I have shown three such metal strips 1 2 3, the middle one, 2, preferably, but

not necessarily, of a softer material than the steel bands 1 and 3, and this softer material may be a textile fabric, soft metal, indiarubber, and the like. This softer material can be simply laid in between the folds of the harder metal, as shown in Fig. 2, or be folded transversely between the vertical zigzag folds, as shown in Fig. 3, or both of the arrangements shown in Figs. 2 and 3 may be combined.

The strips of softer material when of fabric or the like may be coated with any suitable substance so as to cause them to stick to the folds of the harder material, or any soft binding material may be poured in a liquid state upon the softer material just before compressing the strips. The principal feature is that this material is composed of alternate layers of hard and soft material having sound-deadening property.

The material is attachedto wheels, brakeshoes, and the like by means of pivots, screws, shrinking, or any other manner. A good way of attachin this material to its support is by means 01 a dovetail, as shown in Figs. 4 and 5, Where the zigzag is provided along its longitudinal sides with grooves 6, into which bend the upwardly-projecting edges of the support or wheel-rim 7. In tires where the dovetail support or rim 6 is fixed to the wheel sound-deadening bands can be placed in position in the following man-. ner: The edges of the support 7 are turned down at one point of the circumference, as shown at 8 in Fig. 5. The band with its grooves is introduced through this opening and shoved along the rim until it surrounds the whole of the wheel, whereupon the edges are again bent upward and securely lock the band in place. In brake-shoes the channel receiving the material can be open at both ends and the grooves in the bands preferably be made shorter than the length of the projections, so that the band can be pushed in for a certain distance from one end of the brake-shoe and stopped by the end of the grooves or it can be held in lace by a cotterpin or any other suitable astening. These bands are formed by passing the metal supports between hard rollers, said rollers being provided with oblique teeth or riffles, as shown in Figs. 6 and 7. By oblique teeth or riffies is meant that the teeth are inclined to the axes of the rollers, as illustrated in the drawings. These rollers do not come in contact when being rotated, there being sufficient space between the intermeshing teeth for the passage of the band to be crimped without stopping the revolution of the rollers or breaking off the teeth. When the band is passing through said rollers, it will be bent zigzag and then passed between a pair of pressure-rollers, either placed sidewise or above and below the band, as it issues from said rollers. These pressure-rollers tend to reduce the speed of the band without entirely stopping this movement, so as to compact the same. The band thus made will be elastic in a transverse direction, while its bending will be oblique. When used as a tire, the

usual noise will be considerably reduced and the wheel run easier. When used in brakeshoes, the noise due to the friction of the rotating wheels is also reduced and the braking capacity is considerably increased.

I claim 1. A material for deadening sounds and the like comprising a long, thin, strip of hard material bent zigzag, substantially as described.

2. A material for deadening sounds and the like comprising a plurality of long, thin, superposed strips bent zigzag, substantially as described.

3. A material for deadening sounds and the like comprising a plurality of thin superposed strips of different material bent zigzag, substantially as described.

4. A material for deadening sounds and the like comprising a thin strip bent zigzag, the bends thereof at an angle to the longitudinal direction of the strips, substantially as described.

5. A material for deadening sounds and the like comprising a plurality of thin superposed strips bent zigzag and the bends being at an angle to the longitudinal direction of the strips, substantially as described.

6. A material for deadening sound and the like corn rising a plurality of thin superposed strips 0 different material bent zigzag the bends thereof being at an angle to the longitudinal direction'of the strips, substantially as described.

7. A material for deadening sound and the like comprising a thin strip of steel bent zigzag, substantially as described.

8. A material for deadening sound and the like comprising a plurality of thin superposed strips of steel bent zigzag, the bends thereof at an angle to the longitudinal direction of the strips, substantially as described.

9. A material for deadening sound and the like comprising a thin strip of metal bent zigzag and softer material interposed between the bends, substantially as described.

a 10. A material for deadening sound and the like comprising a thin strip of metal bent zigzag and another strip of material bent transversely in and out between the bends thereof, substantially as described.

11. A material fordeadening sound and the like comprising a thin strip of metal bent zigzag, the bends thereof at an angle to the longitudinal direction of the strip, and a strip of another material bent transversely in and out between the bends thereof, substantially as described.

12. A material for deadening sound and the like comprising thin superposed strips of steel, the bends thereof at an angle to the longitudinal direction of the strip and a strip of another material bent transversely in and out between the bends thereof, substantially as described.

13. A material for deadening sounds and the like comprising a strip of hard material bent zigzag and having lateralgrooves, substantially as described.

14. A material for deadening sound and the like comprising a thin strip of steel bent zigzag having grooves cut in the sides thereof, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

, AUGUST VILHELM RINGSTROM. Witnesses:

HUGO PALMQUIST, A. HALLDIN. 

